144221455 has 48 divisors (see below), whose sum is σ = 220237056. Its totient is φ = 89994240.

The previous prime is 144221447. The next prime is 144221503. The reversal of 144221455 is 554122441.

It is not a de Polignac number, because 144221455 - 2³ = 144221447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128557 + ... + 129673.

It is an arithmetic number, because the mean of its divisors is an integer number (4588272).

Almost surely, 2^144221455 is an apocalyptic number.

144221455 is a deficient number, since it is larger than the sum of its proper divisors (76015601).

144221455 is a wasteful number, since it uses less digits than its factorization.

144221455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1177 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 144221455 is about 12009.2237467706. The cubic root of 144221455 is about 524.4168339449.

Adding to 144221455 its reverse (554122441), we get a palindrome (698343896).

The spelling of 144221455 in words is "one hundred forty-four million, two hundred twenty-one thousand, four hundred fifty-five".